isImplicit

Returns true if this element is not present in the code (automatically added by the
Java compiler or inferred when the model is built).
Consequently, implicit elements are not pretty-printed and have no position.

clone

Clone the element which calls this method in a new object.
Note that that references are kept as is, and thus, so if you clone whole classes
or methods, some parts of the cloned element (eg executable references) may still point to the initial element.
In this case, consider using methods Refactoring.copyType(CtType) and Refactoring.copyMethod(CtMethod) instead which does additional work beyond cloning.